Facebook Access Controller

Enforces 15-minute cooldown between Facebook visits and limits each visit to 5 minutes
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// ==UserScript==
// @name         Facebook Access Controller
// @namespace    http://tampermonkey.net/
// @version      1.1
// @description  Enforces 15-minute cooldown between Facebook visits and limits each visit to 5 minutes
// @author       luudanmatcuoi
// @license      MIT
// @match        *://*.facebook.com/*
// @grant        GM_setValue
// @grant        GM_getValue
// ==/UserScript==

(function() {
    'use strict';
    const allow_duration = 5;
    const block_duration = 20;

    // Get the last visit time from storage
    const lastVisit = GM_getValue('lastFacebookVisit', null);
    const lastAllow = GM_getValue('lastFacebookAllow', null);
    const currentTime = new Date().getTime();

    // Nếu trước đó có lastVisit
    if (lastVisit) {
        var timeSinceLastVisit = (currentTime - parseInt(lastVisit)) / (1000 * 60); // in minutes
        var timeSinceLastAllow = (currentTime - parseInt(lastAllow)) / (1000 * 60); // in minutes

        // Nếu đang trong khoảng allow --> Chạy tiếp
        if (timeSinceLastAllow < allow_duration) {
            GM_setValue('stage_fb', true);
        // Nếu trong khoảng block --> Block và return
        } else if (timeSinceLastVisit < block_duration ) {
            const minutesAgo = Math.floor(timeSinceLastVisit);
            const secondsAgo = Math.floor((timeSinceLastVisit - minutesAgo) * 60);
            const waitTime = Math.ceil(block_duration - timeSinceLastVisit);

            // Create HTML for the block page
            const blockHTML = `
            <html>
            <head>
                <title>Facebook Break Time</title>
                <style>
                    body {
                        font-family: Arial, sans-serif;
                        text-align: center;
                        padding-top: 100px;
                        background-color: #f0f2f5;
                    }
                    .container {
                        max-width: 600px;
                        margin: 0 auto;
                        padding: 20px;
                        background-color: white;
                        border-radius: 8px;
                        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
                    }
                    h1 {
                        color: #1877f2;
                    }
                    .timer {
                        font-size: 24px;
                        font-weight: bold;
                        margin: 20px 0;
                    }
                    .info {
                        margin-bottom: 20px;
                        color: #555;
                    }
                </style>
            </head>
            <body>
                <div class="container">
                    <h1>Facebook Break Time</h1>
                    <div class="info">
                        You visited Facebook ${minutesAgo} min ${secondsAgo} sec ago.<br>
                        Please take a break before returning.
                    </div>
                    <div class="timer">
                        Wait time: ${waitTime} minutes
                    </div>
                    <p>This page will automatically redirect you back when your break is complete.</p>
                    <div id="countdown"></div>
                </div>

                <script>
                    // Set the time we're counting down to
                    const redirectTime = new Date().getTime() + (${waitTime} * 60 * 1000);

                    // Update the countdown every 1 second
                    const countdownElement = document.getElementById("countdown");
                    const countdownTimer = setInterval(function() {
                        // Get current time
                        const now = new Date().getTime();

                        // Find the distance between now and the countdown time
                        const distance = redirectTime - now;

                        // Time calculations for minutes and seconds
                        const minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
                        const seconds = Math.floor((distance % (1000 * 60)) / 1000);

                        // Display the countdown
                        countdownElement.innerHTML = minutes + "m " + seconds + "s";

                        // If the countdown is finished, redirect back to Facebook
                        if (distance < 0) {
                            clearInterval(countdownTimer);
                            window.location.href = "${window.location.href}";
                        }
                    }, 1000);
                </script>
            </body>
            </html>
            `;
            document.open();
            document.write(blockHTML);
            document.close();
            return;

        // Nếu ngoài khoảng block --> Ghi lại lần chạy này và chạy tiếp
        } else {
            GM_setValue('stage_fb', false);
            GM_setValue('lastFacebookVisit', currentTime.toString());
            GM_setValue('lastFacebookAllow', currentTime.toString());
        }
    }

    // Create container for the timer
    const timerContainer = document.createElement('div');
    timerContainer.style.position = 'fixed';
    timerContainer.style.bottom = '10px';
    timerContainer.style.left = '10px';
    timerContainer.style.backgroundColor = '#12224f';
    timerContainer.style.color = 'white';
    timerContainer.style.padding = '5px 5px';
    timerContainer.style.borderRadius = '5px';
    timerContainer.style.zIndex = '9999';
    timerContainer.style.boxShadow = '0 2px 4px rgba(0,0,0,0.2)';
    timerContainer.style.fontSize = '16px';
    timerContainer.style.fontWeight = 'bold';

    if (lastVisit) {
        const lastVisitDate = new Date(parseInt(lastVisit));
        const timeSinceLastVisit = Math.floor((currentTime - parseInt(lastVisit)) / (1000 * 60));
        // notification.textContent = `Visit allowed. Last visit was ${timeSinceLastVisit} minutes ago (${lastVisitDate.toLocaleTimeString()}).`;
    } else {
        var aha = 3;
    }

    // Add notification and timer to page when body is available
    const addElementsToPage = () => {
        document.body.appendChild(timerContainer);
        // Start 5-minute countdown for this session
        let stage = GM_getValue('stage_fb', false);
        let secondsLeft = allow_duration * 60;
        if (stage===true) {
            //GM_setValue('secondsLeft', allow_duration * 60 - parseInt(timeSinceLastAllow * 60));
            secondsLeft = allow_duration * 60 - parseInt(timeSinceLastAllow * 60);
        }
        const updateTimer = () => {
            const minutes = Math.floor(secondsLeft / 60);
            const seconds = secondsLeft % 60;
            timerContainer.textContent = `Time remaining: ${minutes}:${seconds < 10 ? '0' : ''}${seconds}`;

            if (secondsLeft <= 0) {
                // Time's up, redirect to a "session ended" page
                const sessionEndedHTML = `
                <html>
                <head>
                    <title>Facebook Session Ended</title>
                    <style>
                        body {
                            font-family: Arial, sans-serif;
                            text-align: center;
                            padding-top: 100px;
                            background-color: #f0f2f5;
                        }
                        .container {
                            max-width: 600px;
                            margin: 0 auto;
                            padding: 20px;
                            background-color: white;
                            border-radius: 8px;
                            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
                        }
                        h1 {
                            color: #1877f2;
                        }
                        .message {
                            margin: 20px 0;
                            font-size: 18px;
                        }
                        .info {
                            margin-bottom: 20px;
                            color: #555;
                        }
                    </style>
                </head>
                <body>
                    <div class="container">
                        <h1>Facebook Session Ended</h1>
                        <div class="message">
                            You've used your 5-minute Facebook allowance.
                        </div>
                        <div class="info">
                            You can return after a 10-minute break.
                        </div>
                    </div>
                </body>
                </html>
                `;

                document.open();
                document.write(sessionEndedHTML);
                document.close();
                return;
            }

            secondsLeft--;
            setTimeout(updateTimer, 1000);
        };

        updateTimer();

    };

    if (document.body) {
        addElementsToPage();
    } else {
        window.addEventListener('DOMContentLoaded', addElementsToPage);
    }
})();
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